// topic-guard.test.mjs
// Tester UserPromptSubmit emne-guard (SC6) i inject-okr-context: kun
// OKR-relevante prompter injiserer kontekst; en eksplisitt ikke-matchende
// prompt suppresses; tvil (tomt felt / ingen stdin) -> default-inject.
// Spawner hooken som subprosess med kontrollert cwd + stdin. Zero npm deps.
// Moenster: tests/inject-okr-context.test.mjs (begge-casen + input-opsjon).

import { test } from 'node:test';
import assert from 'node:assert/strict';
import { execFileSync } from 'node:child_process';
import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';

const HOOK = join(
  dirname(fileURLToPath(import.meta.url)),
  '..',
  'hooks',
  'scripts',
  'inject-okr-context.mjs',
);

function makeProjectConfig(workDir, navn) {
  const p = join(workDir, '.claude');
  mkdirSync(p, { recursive: true });
  writeFileSync(join(p, 'okr.local.md'), `---\nnavn: "${navn}"\n---\n`);
}

function runHook(cwd, input = '') {
  // execFileSync returnerer stdout; hooken avslutter alltid med exit 0.
  return execFileSync('node', [HOOK], {
    cwd,
    env: { ...process.env },
    input: input,
    encoding: 'utf8',
  });
}

function withWork(fn) {
  const work = mkdtempSync(join(tmpdir(), 'okrtopic-'));
  try {
    fn(work);
  } finally {
    rmSync(work, { recursive: true, force: true });
  }
}

test('irrelevant prompt: suppresses injeksjon (tom stdout)', () => {
  withWork((work) => {
    makeProjectConfig(work, 'TopicOrg');
    const out = runHook(work, JSON.stringify({ prompt: 'hva er vaeret i dag' }));
    assert.equal(out.trim(), '', 'ikke-OKR-prompt skal suppresses selv med gyldig config');
  });
});

test('relevant prompt: injiserer OKR-kontekst', () => {
  withWork((work) => {
    makeProjectConfig(work, 'TopicOrg');
    const out = runHook(work, JSON.stringify({ prompt: 'hjelp meg skrive en OKR for neste tertial' }));
    assert.match(out, /OKR-kontekst/, 'OKR-relevant prompt skal injisere kontekst');
  });
});

test('tomt prompt-felt: bevarer inject-default (tvil -> injiser)', () => {
  withWork((work) => {
    makeProjectConfig(work, 'TopicOrg');
    const out = runHook(work, JSON.stringify({ prompt: '' }));
    assert.match(out, /OKR-kontekst/, 'tomt prompt-felt -> tvil -> injiser');
  });
});

test('ingen stdin: bevarer inject-default (regresjonsvakt)', () => {
  withWork((work) => {
    makeProjectConfig(work, 'TopicOrg');
    const out = runHook(work); // input utelatt -> tom stdin
    assert.match(out, /OKR-kontekst/, 'ingen stdin -> tvil -> injiser');
  });
});